/
generate.go
69 lines (60 loc) · 1.81 KB
/
generate.go
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package crypto
import (
"crypto/sha256"
"strings"
"github.com/centrifuge/go-centrifuge/crypto/ed25519"
"github.com/centrifuge/go-centrifuge/crypto/secp256k1"
"github.com/centrifuge/go-centrifuge/utils"
"golang.org/x/crypto/blake2b"
)
// GenerateSigningKeyPair generates based on the curveType and writes keys to file paths given.
func GenerateSigningKeyPair(publicFileName, privateFileName, curveType string) (err error) {
var publicKey, privateKey []byte
switch strings.ToLower(curveType) {
case CurveSecp256K1:
publicKey, privateKey, err = secp256k1.GenerateSigningKeyPair()
case CurveEd25519:
publicKey, privateKey, err = ed25519.GenerateSigningKeyPair()
default:
publicKey, privateKey, err = ed25519.GenerateSigningKeyPair()
}
if err != nil {
return err
}
err = utils.WriteKeyToPemFile(privateFileName, utils.PrivateKey, privateKey)
if err != nil {
return err
}
err = utils.WriteKeyToPemFile(publicFileName, utils.PublicKey, publicKey)
if err != nil {
return err
}
return nil
}
// GenerateHashPair generates a preimage and hash pair. This is useful in a commit reveal scheme such as what we use for anchor pre-commit > commit flow.
func GenerateHashPair(preimageSize int) (preimage, hash []byte, err error) {
preimage = utils.RandomSlice(preimageSize)
hash, err = Blake2bHash(preimage)
return preimage, hash, err
}
// Blake2bHash wraps inconvenient blake2b_256 hashing ops
func Blake2bHash(value []byte) (hash []byte, err error) {
h, err := blake2b.New256(nil)
if err != nil {
return nil, err
}
_, err = h.Write(value)
if err != nil {
return nil, err
}
return h.Sum(nil), nil
}
// Sha256Hash wraps inconvenient sha256 hashing ops
func Sha256Hash(value []byte) (hash []byte, err error) {
h := sha256.New()
_, err = h.Write(value)
if err != nil {
return nil, err
}
return h.Sum(nil), nil
}